Hq 20TH Gen Hospital

One of my grandfathers served in the CBI theatre with the 20th gen hospital.He entered the servie on 03-13-44 and was discharged 01-15-45.He was in India from 08-23-45 to 12-04-45. I have been trying to find out with which army he was associated.My other grnadfather was in the 33rd field hospital in Italy and was in the 5th army, I was able to talk with him before he passed away to find this out, but was not as fortunate with the other grandfather.Thanks for any help you can provide.